Portable power-driven tool



March 24, 1925. I T530386 H. J. GORA- .PO ABLE POWER muvrm T001.

Fi ied Oct. 26, 1925 2 Sheets-Sheet i 11 a 1.9 [4 l5 ATTORNEYS March .24, 1925.

H. GORA PORTABLE POWER DRIVEN TOOL Filed Oct. 26, 19 23 2 Sheets-Sheet 2 ":I-INTOR ATTORNEYS Patented Mar. 24, 1925.

UNITED. STATES PATEN OFFICE.

HENRY J. GOR or JERSEY CITY, NEW JERSEY, ASSIGNOR or TWO-NINTHS TO HENRY ,,REMMER, or w. SAYVILLE, NEw YoRR, rwo-Nm'rns 'ro rREnERIcR c. MEYER, or BRoo-xL N, NEw oRx, AND 'rwo-NI rns 'ro EUGENE MARRYATT, or BROOK- LYN, NEW YORK.

PORTABLE POWER-DRIVEN TOOL.

Application filed October 26, 1923,. Serial No. 670,817.

To all whom it may concern.

Be it knownthat I, HENRY J. GORA, a citizen of the United States, residing at Jersey City, in the county of Hudson and '5 State of New Jersey, have invented new and useful Improvements .in Portable Power-Driven Tools, of which the following is a specification.

invention relates to tools and more 1 particularly to a ortable power driven tool such as a saw. ne ofthe objects of the invention is to provide a device of this character which is simple in construction and efiicient in operation. Other objects, advantages and features will appear more fully inthe following detailed description and appended claims. 1

The accompanying drawings forming a part of this specification illustrate several embodiments of the invention.

Referring to the drawings, Figure 1 is a side elevation of one embodi ment of the invention.

Figure 2 is a fragmentary plan view thereof. a

Figure 3 is aside elevation'of the same viewed on the opposite side from that shown in Fig. 1. Figure 4 is a side elevation of another an embodiment ofthe invention; and- Figures 5, 6 and 7 are fragmentary plan views of modifications.

Referring to Figs. 1 to 4 inclusive, an integral frame of suitable material, such as steel or aluminum, comprisesa base portion 1, a handle portion 2 projecting upwardly from the rear of the base (portion and a por-. tion 3 extending upwar ly from the forward end of the base portion 1 at an 0b- 0 tuse angle thereto. Secured to the portion 1 of the frame is a suitable motor 4 which, as shown, is' an electric motor having its shaft 5 extending longitudinally of the frame parallel to the base portion land at 5 an acute angle to the inclined portions 3 of the frame. A suitable tool, which in Figs. 1 to 4 inclusive is in the form-of a rotatable saw 6, is supported'by the portions 3 of the frame and driven from the motor shaft 5. In the form of invention shown' in Figs. 1, 2 and 3, the saw 6 is mounted 'withits axis of rotation intersecting and at right angles to the axis ofshaft 5. The saw is such as the nut 17, for preventing by whichthe motor shaft may be caused to rotate in either direction or stopped. When the operating member is in mid position the motor Wlll be stopped. When the said member is at one end of the slot the motor shaft will rotate in one direction, and vice versa. The constru tion shown in these figures is designed pri arily for the cutting of materials, such as wood. I

Where it is desired to cut hardermaterials,-such as metal, it is desirable to very materially reduce the angular velocity of the I saw below that of the shaft 5 and also to provide the saw with a considerable amount of' power. I accordingly preferably employ for these conditions a construction such as shown 1n F 1g. 4 in which the saw 6 is'driven by suitable worm gearing comprising, for example, a worm 9 -secured to the shaft 5 and a worm wheel 10 to which the saw is secured. 1 n

In order to regulate. the depth of out ofthe saw .1 preferably provide a gage 11 which, as shown, is hinged at the intersection of the parts land 3 of the frame. The gage is provided-with a rectangular opening '12 through which the saw blade passes.

The gage mounting, as shown, permits not only adjustment of the different depths of cut ment of the gage for cutting miters. The mounting shown comprises a block 14 which is mounted upon the frame by a pivot 15 so as to be movable about a horizontal axis gage to provide for ut also an adjust-.

parallel to the axis of rotation of the. saw.

By tightening the nut 15, the block 14 secured to the pivot 15 as well as the gage .(which is carried by the said block) may be fastened with the desired amount of friction against movement "about the axis of pivot 15. The gage is provided with a 1on gitudinal 1 pivot portion 16, which passes through the block 14 and is provided at its outer end." with suitable securing means,

ngitudiment of the n'al displacement of the gage from the'block 14. The axis of-the portion 16 preferably extends parallel'to the surface of the saw and approximately through the center of the saw opening 12 of the gage; so that angular movement of the gage about the axis of the part 16 will not be interfered with by engagement between the saw and the gage. The gage may be held against such angular movement with respect to. the block 14 by suitable means such as the set screw .18. To facilitate adjustment of the gage to any desired angular position about the axis of the part 16 be provided. To limit the upward movegage .11 with respect to the frame 1 and thereby determine the depth of cut, suitable adjustable means, such as screw 20, arranged to bear on the top of the gage may be provided. By means of this screw 20 the gage 'may be'adjusted about the pivotal axis 15 without loosening nut 15 when the latter is not drawn up too tight. It will be seen that the mounting of the gage is such that it may be adjusted to a position in close proxlmity to the axis of the saw so as to permit the use of a comparatively's mall saw for a given depth of cut.

The frame also is so constructed as not only to afford suitable means for supporting the motor but also to offer no obstruction to the cutting by the saw to a depth approximately equal to its radius. The resulting adaptability of the device to the use of small saw blades results in a very light construction requiring but small power.

The'gage 11 is preferably provided with a curved upwardly extending portion concentrio with the saw blade and serving with the body of the gage to cover. the edge of the saw when the gage is in lower or inoperative position thus serving as a guard to prevent injury by the saw. A guard 20 secured to" the ort1on-3 of the frame covers the upper portion of the saw.

In use when it is desired to cut to a desired depth the screw 20 is adjusted to position the gage so that the saw pro'ects below the gage an amount e ual to t e desired depjt The sawis app ied to the material to e cut and started into operation, the gage llacting as a support for the tool after the saw has cut'to the desired depth. The tool .may now be moved longitudinally to make a the depth-of cut.

cut of this depth of desired length, the gage 11 flat resting on the work and determining In such use the body part -1 of the frameand the handle 2 thereof will the gage in proper be inclined at an angle'to the work. When it is desiredto make a miter cut, the set screw 18 1s loosened andthe gage adjusted about the axis of part 16 to a suitable position as determined by the 'graduations 19, whereupon the screw 18 is again set to hold position with respect to and ther suitable graduations, as at 19, may.

transverse saw supporting a cutter carried by'said frame and driven by with the gage 11 resting flat upon the work determining the proper angular position 0 the saw 6 with respect to the work.

Instead of a saw such as 6 other tools may be employed. For example in Fig. 5 I have shown a chuck 21 adapted to hold a drill bit. To permit the interchangeability of the tools the tool? shaft 22 is provided with an overhanging portion 23 on which the tools, such as-the saw or the drill chuck, may be detachably secured. To this end'the overhanging portion of the shaft 22 may be threaded to enable the drill chuck to be threaded thereon or to coact with a nut 24 (see Fig. 3) to secure the saw to the shaft against a shoulder on the shaft. I

Instead of securing the drill chuck to the shaft 22, a separate shaft 25 may eprovided therefor. This shaft 25, as 'shown in Fig. 6, extends longitudinally of the frame and has secured thereto a bevel gear 26 by which the shaft is driven from the bevel gear 7 on the saw shaft 22. In other respects the machine is.

the .same as that shown in Figs. 1, 2 and 3.

In Fig. 7 I have shown my improved device provided with a rotatable planing tool 30 secured to and driven by the shaft 22. In this device, the ga e 11' is of considerable width and is mounte for movement toward and away from the axis of the tool but not for movement at an angle to such axis. Whilel have described several embodiments of my invention it is to be understood that my invention is not limited to the details or modifications shown.

Having thus described my invention, what I claim as new and. desire to secure by Let ters Patent is 1. A portable power driven saw comprising a frame, a motor carried by said frame, a sawcarried by said frame and driven by said motor, a gage pivoted to said frame for movement about an axis in the cutting lane of said saw, and releasable means for olding said gage against such pivotal movement.

2. A portable power driven tool comprisa frame, a motor carried by saidframe,

said motor, a gage connected to said frame by means of a universal joint and t'aveling over the work therewith, withthe advance of the tool, and means for securing said gage rigidly in any of its operative positions.

.3. In a portable power driven tool, the

combinat on of a frame, a motor supported thereby and havingra shaft extending longitudinally of the ame, a rota tool ar-, ranged with its axis shaft, means for driving said tool from said shaft, said frame havinga portion extending longitudinally of and shaft at an angle at right ang es tosaid r junction of said angular extension and frame and movable toward and from aposition coinciding with that of the extension.

! 4. A portable power driven tool comprisif ing a frame supporting a motor and a rotary cutter driven thereby, a. guiding shoe or gage to engage the work and pivotally connected to the frame in a manner to govern the depth 10 of the cut and also the plane of rotation of the cutter.

' In testimony whereof, I have signed my name to this specification.

HENRY J. GORA. 

